LONDON, UNITED KINGDOM - JUNE 014: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch the fly-past from the balcony of Buckingham Palace during Trooping the Colour, Queen Elizabeth II's Birthday Parade on June 14, 2014 in London, England. (Photo by Max Mumby/Indigo/Getty Images)